Former Cabinet Minister Norman Tebbit has attacked plans for gay marriage, warning of the possibility of a lesbian queen and suggesting he could marry his own son to avoid tax.

In an outspoken interview, the Tory grandee told the Big Issue the government had "really fucked things up" by changing the law on marriage, and said it would drive voters into the arms of Ukip.

Tebbit's comments were made before Ukip gained more than 100 seats in the local elections.

He claimed the plans, which are back before MPs this week, had not been thought through and could have implications for the future of the monarchy.

tebbit lesbian queen

What if I married my son?

"I said to a minister I know: have you thought this through? Because you're doing the law of succession, too," he told the magazine.

"When we have a queen who is a lesbian and she marries another lady and then decides she would like to have a child and someone donates sperm and she gives birth to a child, is that child heir to the throne?"

His concerns echoed those of Tory peer Lord True, who tried to change the Succession To The Crown Bill in March.

Tebbit, a former Tory Party chairman who served under Margaret Thatcher, also said the gay marriage change would allow parents to marry their children to get out of paying.

"It's like one of my colleagues said: we've got to make these same sex marriages available to all," he said.

"It would lift my worries about inheritance tax because maybe I'd be allowed to marry my son.

"Why not? Why shouldn't a mother marry her daughter? Why shouldn't two elderly sisters living together marry each other?"

He added: “I quite fancy my brother!”

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  • People celebrate outside the Parliament after lawmakers passed the "marriage equality project" in Montevideo, Uruguay,Wednesday, April 10, 2013. Their vote makes Uruguay the third country in the Americas after Canada and Argentina to eliminate laws making marriage, adoption and other family rights exclusive to heterosexuals. In all, 11 other nations around the world have already taken this step. (AP Photo/Matilde Campodonico)

  • People celebrate in parliament after lawmakers voted to legalize gay marriage in Montevideo, Uruguay,Wednesday, April 10, 2013. President Jose Mujica's ruling Broad Front majority is expected to put the law into effect within 10 days. (AP Photo/Matilde Campodonico)

  • People attending a session of parliament stand up to celebrate after lawmakers voted to legalize same sex marriage in Montevideo, Uruguay,Wednesday, April 10, 2013. The law was backed by 71 of the senators in the 92-seat legislature in Wednesday's vote. (AP Photo/Matilde Campodonico)

  • People celebrate after lawmakers voted to legalize same sex marriage inside Parliament in Montevideo, Uruguay, Wednesday, April 10, 2013. Supporters of the law, who had filled the public seats in the Senate, erupted in celebration when the results were announced. The bill received the backing of 71 members of the 92-seat chamber. (AP Photo/Matilde Campodonico)

  • A man holds up a gay pride flag as he and others celebrate after lawmakers legalized same sex marriage inside Parliament in Montevideo, Uruguay, Wednesday, April 10, 2013. The vote makes Uruguay the third country in the Americas after Canada and Argentina to eliminate laws making marriage, adoption and other family rights exclusive to heterosexuals. In all, 11 other nations around the world have already taken this step. (AP Photo/Matilde Campodonico)

  • People celebrate outside the Parliament after lawmakers passed the "marriage equality project" in Montevideo, Uruguay,Wednesday, April 10, 2013. Their vote makes Uruguay the third country in the Americas after Canada and Argentina to eliminate laws making marriage, adoption and other family rights exclusive to heterosexuals. In all, 11 other nations around the world have already taken this step. (AP Photo/Matilde Campodonico)

  • FRANCE-SOCIETY-WEDDING-DEMONSTRATION-PARIS

    people are gathered on Denfert-Rochereau square in Paris at the beginning of the demonstration for the legalisation of gay marriage and LGBT (lesbian, gay, bisexual, and transgender) parenting, in Paris on January 27, 2013, two days before a parliamentary debate on the government’s controversial marriage equality bill, which will allow gay couples the same rights as their straight counterparts. At left, foreground, a banner of a student union which reads : 'Students mobilised'. AFP PHOTO /THOMAS SAMSON (Photo credit should read THOMAS SAMSON/AFP/Getty Images)

  • FRANCE-SOCIETY-WEDDING-DEMONSTRATION-PARIS

    Girls take part in a demonstration for the legalisation of gay marriage and LGBT (lesbian, gay, bisexual, and transgender) parenting, in Paris on January 27, 2013, two days before a parliamentary debate on the government’s controversial marriage equality bill, which will allow gay couples the same rights as their straight counterparts. AFP PHOTO /THOMAS SAMSON (Photo credit should read THOMAS SAMSON/AFP/Getty Images)

  • FRANCE-SOCIETY-WEDDING-DEMONSTRATION-PARIS

    Tow men hold a French national flag and a rainbow flag as they gather to take the start of a demonstration for the legalisation of gay marriage and LGBT (lesbian, gay, bisexual, and transgender) parenting, in Paris on January 27, 2013, two days before a parliamentary debate on the government’s controversial marriage equality bill, which will allow gay couples the same rights as their straight counterparts. AFP PHOTO / KENZO TRIBOUILLARD (Photo credit should read KENZO TRIBOUILLARD/AFP/Getty Images)

  • FRANCE-SOCIETY-WEDDING-DEMONSTRATION-PARIS

    People take part in a demonstration for the legalisation of gay marriage and LGBT (lesbian, gay, bisexual, and transgender) parenting, in Paris on January 27, 2013, two days before a parliamentary debate on the government’s controversial marriage equality bill, which will allow gay couples the same rights as their straight counterparts. AFP PHOTO /THOMAS SAMSON (Photo credit should read THOMAS SAMSON/AFP/Getty Images)

  • FRANCE-SOCIETY-WEDDING-DEMONSTRATION-PARIS

    People take part in a demonstration for the legalisation of gay marriage and LGBT (lesbian, gay, bisexual, and transgender) parenting, in Paris on January 27, 2013, two days before a parliamentary debate on the government’s controversial marriage equality bill, which will allow gay couples the same rights as their straight counterparts. AFP PHOTO / KENZO TRIBOUILLARD (Photo credit should read KENZO TRIBOUILLARD/AFP/Getty Images)

  • FRANCE-SOCIETY-WEDDING-DEMONSTRATION-PARIS

    People take part in a demonstration for the legalisation of gay marriage and LGBT (lesbian, gay, bisexual, and transgender) parenting, in Paris on January 27, 2013, two days before a parliamentary debate on the government’s controversial marriage equality bill, which will allow gay couples the same rights as their straight counterparts. Placard reads : 'Wedding for everybody' AFP PHOTO / KENZO TRIBOUILLARD (Photo credit should read KENZO TRIBOUILLARD/AFP/Getty Images)

  • FRANCE-SOCIETY-WEDDING-DEMONSTRATION-PARIS

    People take part in a demonstration for the legalisation of gay marriage and LGBT (lesbian, gay, bisexual, and transgender) parenting, in Paris on January 27, 2013, two days before a parliamentary debate on the government’s controversial marriage equality bill, which will allow gay couples the same rights as their straight counterparts. AFP PHOTO / THOMAS SAMSON (Photo credit should read THOMAS SAMSON/AFP/Getty Images)

  • FRANCE-SOCIETY-WEDDING-DEMONSTRATION-PARIS

    People take part in a demonstration for the legalisation of gay marriage and LGBT (lesbian, gay, bisexual, and transgender) parenting, in Paris on January 27, 2013, two days before a parliamentary debate on the government’s controversial marriage equality bill, which will allow gay couples the same rights as their straight counterparts. AFP PHOTO / THOMAS SAMSON (Photo credit should read THOMAS SAMSON/AFP/Getty Images)

  • FRANCE-SOCIETY-WEDDING-DEMONSTRATION-PARIS

    People take part in a demonstration for the legalisation of gay marriage and LGBT (lesbian, gay, bisexual, and transgender) parenting, in Paris on January 27, 2013, two days before a parliamentary debate on the government’s controversial marriage equality bill, which will allow gay couples the same rights as their straight counterparts. AFP PHOTO / THOMAS SAMSON (Photo credit should read THOMAS SAMSON/AFP/Getty Images)

  • FRANCE-SOCIETY-WEDDING-DEMONSTRATION-PARIS

    People take part in a demonstration for the legalisation of gay marriage and LGBT (lesbian, gay, bisexual, and transgender) parenting, in Paris on January 27, 2013, two days before a parliamentary debate on the government’s controversial marriage equality bill, which will allow gay couples the same rights as their straight counterparts. AFP PHOTO /THOMAS SAMSON (Photo credit should read THOMAS SAMSON/AFP/Getty Images)

  • FRANCE-SOCIETY-WEDDING-DEMONSTRATION-PARIS

    A woman holds a placard reading 'Jesus had two fathers and one surrogate mother' during a demonstration for the legalisation of gay marriage and LGBT (lesbian, gay, bisexual, and transgender) parenting, in Paris on January 27, 2013, two days before a parliamentary debate on the government’s controversial marriage equality bill, which will allow gay couples the same rights as their straight counterparts. AFP PHOTO / KENZO TRIBOUILLARD (Photo credit should read KENZO TRIBOUILLARD/AFP/Getty Images)

  • FRANCE-SOCIETY-WEDDING-DEMONSTRATION-PARIS

    People hold a giant rainbow flag as they take in a demonstration for the legalisation of gay marriage and LGBT (lesbian, gay, bisexual, and transgender) parenting, in Paris on January 27, 2013, two days before a parliamentary debate on the government’s controversial marriage equality bill, which will allow gay couples the same rights as their straight counterparts. AFP PHOTO / KENZO TRIBOUILLARD (Photo credit should read KENZO TRIBOUILLARD/AFP/Getty Images)

  • FRANCE-SOCIETY-WEDDING-DEMONSTRATION-PARIS

    People take part in a demonstration for the legalisation of gay marriage and LGBT (lesbian, gay, bisexual, and transgender) parenting, in Paris on January 27, 2013, two days before a parliamentary debate on the government’s controversial marriage equality bill, which will allow gay couples the same rights as their straight counterparts. AFP PHOTO / KENZO TRIBOUILLARD (Photo credit should read KENZO TRIBOUILLARD/AFP/Getty Images)

  • FRANCE-SOCIETY-WEDDING-DEMONSTRATION-PARIS

    People take part in a demonstration for the legalisation of gay marriage and LGBT (lesbian, gay, bisexual, and transgender) parenting, in Paris on January 27, 2013, two days before a parliamentary debate on the government’s controversial marriage equality bill, which will allow gay couples the same rights as their straight counterparts. AFP PHOTO / KENZO TRIBOUILLARD (Photo credit should read KENZO TRIBOUILLARD/AFP/Getty Images)